frank-dragoon: lower the context to 200704 (ctx and pool together)

Frank's call the same evening as the native-payload cutover: HALOGEN_CTX and
HALOGEN_KV_POOL_POSITIONS both 262144 -> 200704 (a multiple of 4096, the rung
frank-zealot already runs). The checkpoint's native window is 262,144 and the
engine serves anything below it, so this is a RAM decision, not a capability
limit: the KV reservation drops 7.2 GiB -> ~5.4 (the 2026-10-06 pool measured
14.6), and by the FLAGS.md law -- RAM the pool takes is RAM that n-gram table
loses -- the freed positions become page cache for the 47.68 GiB table that
long prompts read. Engine-side total ~74 GiB instead of 75.8.

The 400-zone law is invariant to the value, so the harness moves WITH the
ceiling: models.yml contextWindow 217088 -> 155648 = ceiling - 45056, keeping
the gap that absorbs the chars/4 under-count (worst-case request ~156.2k vs
the 200,704 ceiling, ~44k margin). Compaction now fires at 85% = 132,300 est
(~136k measured); the 180k target of the 262,144 era is unreachable because
the window itself is 155,648. maxTokens 45056 and the coupled
cap/timeout 65536/7200 are untouched.

Cost stated plainly: with pool == ctx, ONE maximum-length request fills the
pool, so two long conversations never coexist (two of <=100k do). Acceptable
because frank-dragoon carries only the slow role and the security-reviewer
subagent, not the interactive workhorse.

Seam re-keyed: the fit-law test now proves the invariant at the new pair, and
the pool law (ctx <= pool <= slots * ctx) still holds with pool == ctx.

serverAppConfigs-docs/index.md

@@ -313,9 +313,10 @@ The LLM inference fleet on the two hosts. Full index:
 - [[frank-dragoon-flash-server-v2-native]] — **ACTIVE frank-dragoon runbook
   since 2026-10-17**: halogen-flash-server 0.16.2 serving the **NATIVE v2
   abliterated** conversion of orcarouter's pinned BF16
-  (`qwen38-flash-next-v2-abliterated.hgn`, 62.1 GiB) with the card's
-  memory-saving `HALOGEN_KV_POOL_POSITIONS=262144` (7.2 GiB, one pool behind
-  both slots) and the stock peonist n-gram/vision companions **hardlinked**
+  (`qwen38-flash-next-v2-abliterated.hgn`, 62.1 GiB) at ctx/pool **200,704**
+  (`HALOGEN_KV_POOL_POSITIONS=200704`, ~5.4 GiB — one pool behind both slots,
+  lowered the same evening from the card's 262,144) and the stock peonist
+  n-gram/vision companions **hardlinked**
   in — engine-tool certified (NIAH 18/18, PPL 3.968, mean KL 0.155); MTP
   always-on, vision ON, no server-side sampler change
 - [[frank-dragoon-flash-server-v2-swift15]] — RETIRED 2026-10-06 → 10-17